著者

藤山 開三

出版者

The Japanese Society of Health and Human Ecology

雑誌

民族衛生 (ISSN:03689395)

巻号頁・発行日

vol.27, no.5, pp.417-444,A24, 1961 (Released:2010-11-19)

参考文献数

16

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Statistical investigations were made on relations between the infant mortality and the social biological factors as a previous paper. The infant death rate was 44.3 (male 48.6, femal 39.9), the neonatal death rate was 22.4 (male 24.5, femal 20.3).The neonatal death rate of premature infant was ten times higher than that of mature infant. The death rate fo premature infant was 194.1 and existed obvious difference between in case of male and in case of female. The death rate of premature infant was the lowest in the third born and in the mother's age from 25 to 29.